The clan chat seems good, but what constitutes a council? The admins? What if you want to include certain people and exclude others? Do you block them? It just seems like it would only cause problems in clans unfortunately...
And the world chat will not work, because there is no way to efficiently stop people from posting ads in the talk section. Also, the ads section will not have too many viewers, because it is just ads. Why would people use a speaker to post something that would be seen by a limited number of users? They would want maximum exposure, so they would post it to the talk section.
Its a nice thought, but unfortunately the ads are here to stay.